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A186999 G.f. satisfies: A(x) = Sum_{n>=0} x^n/(1 - x*A(x)^n)^n. 3
1, 1, 2, 5, 16, 60, 248, 1098, 5127, 24996, 126353, 658914, 3531891, 19406185, 109079066, 626240743, 3668020847, 21899151005, 133179027307, 824588095681, 5195945625141, 33311336524674, 217230789307751, 1440698723164953 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..23.

EXAMPLE

G.f.: A(x) = 1 + x + 2*x^2 + 5*x^3 + 16*x^4 + 60*x^5 + 248*x^6 +...

The g.f. satisfies:

A(x) = 1 + x/(1-x*A(x)) + x^2/(1-x*A(x)^2)^2 + x^3/(1-x*A(x)^3)^3 +...

PROG

(PARI) {a(n)=local(A=1+x); for(i=1, n, A=1+sum(m=1, n, x^m/(1-x*(A+x*O(x^n))^m)^m)); polcoeff(A, n)}

CROSSREFS

Cf. A203000, A186998.

Sequence in context: A107283 A059237 A104547 * A307771 A301306 A000764

Adjacent sequences:  A186996 A186997 A186998 * A187000 A187001 A187002

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Mar 01 2011

STATUS

approved

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Last modified May 22 18:53 EDT 2019. Contains 323481 sequences. (Running on oeis4.)